Review on Efficient Cooling: Spectra Complete Radiator CU1290 for Optimal Engine Performance by Richard Cuneo

The radiator may be fine, but the radiator cap fell apart after a few days. The print block fell out of the cover. I don't know where it went. Probably somewhere in the cooler. I could not find it. I almost broke my engine because of it. After working normally for about a week, it suddenly started leaking water and then the temp gauge got almost hot. I should have stopped and waited. Once I had to buy water at a gas station. The next day the same. I couldn't figure it out and thought I had blown the head gasket but there was no water in the oil. That's when I realized it was coming from the exhaust. One day, while pouring, I noticed the lid. The pressure block was missing. So when the engine got warmer it just drained out of the lid instead of building pressure. Luckily I kept my old lid. Now it works fine.